Health Anxiety + Palpitations

Hello everyone, I'm a 28 year old male who has been experiencing PVCs/PACs since about 16. I first came to notice them during sports and I believe I was getting them quite frequently, at times, every 3 or so beats I'd feel one come prematurely. I was 16 though and after doing an exercise stress test and echo, I didn't think much of it and continued on with life. I believe I had them throughout most of my time into the present day, only that I am now much more conscious of them, unfortunately. Back in 2017, I started to develop pretty bad anxiety over my health. Since 2017 I've had 3-4 echocardiograms (all of which have come back normal), 3 stress tests (which have only showed a handful of PACs, which was explained to me is nothing to worry about), and 4-5 holter monitors, ranging from 3 days-30 days. The first few monitors I wore showed about 20 PACs/PVCs throughout the day. I then saw an electrophysiologist because I needed to be absolutely sure that I got this fully checked out for peace of mind. Anyway, that was the 30 day monitor and I saw the report which showed around 300-500 daily. I was taken back as I only clicked a few events daily and thought I was having maybe 10-15 skipped beats throughout the day. Still, my doctor told me he's not concerned at all. I go to a very reputable heart center on Long Island. Recently, I've felt my heart has been more "racey" and there are times where I will be sitting down and my heart rate is 90-100 for an hour or two. It may calm down at times but it seems the more I pay attention to it the more it comes out. I am pretty active, I walk 30-60 minutes daily with no problem, I lift weights, not heavy like I used to because that tends to bring out the premature beats. My doctor recently switched me from 12.5mg of atenolol and wanted to put me on 50mg of metropolol. I am only taking 25mg because I'm a bit afraid to take 50 as my heart rate is pretty healthy outside of this few random events I get and I don't want it to get too low. I also seem to experience my heart rate spiking after I stand up sometimes which quickly returns to normal. I feel as though my heart doctor was getting annoyed at me after asking quite a few questions after but unfortunately I read a lot on the internet and it tends to freak me out at times. I know that was a long winded message, but anyone experience similar type of things and how has your outcome been? It brings comfort to talk to those who have experience similar things to myself.

did your issue resolve i am going through the same and the doctor says its anxiety disorder